Rc Low Pass Filter Equation. It clearly shows 3db gain at 3 38khz which is the cutoff frequency of this filter. And the capacitive reactance at the breakpoint is.
Frequency response simulation using proteus for the given rc low pass filter is. As explained above the low pass behavior of an rc filter is caused by the interaction between the frequency independent impedance of the resistor and the frequency dependent impedance of the capacitor. This diagram conveys the generic characteristics of the frequency response of an rc low pass filter.
The second order low pass rc filter can be obtained simply by adding one more stage to the first order low pass filter.
It clearly shows 3db gain at 3 38khz which is the cutoff frequency of this filter. A 1 2 n. X c x10 ohms kohms megohms. Also well known is the equation for calculating the 3db aka half power cutoff frequency of the rc low pass filter.
